The Best Generator Shed Products

I don’t like noise. Our dog doesn’t like noise. But our old generator made a ton of noise. Every time we had an ice storm, the power went out, the generator went on, and the dog got nervous. I was also not a fan of the generator taking up space near my car door in the garage. I had to squish between the generator and my car to get into the house.Our very chill dog helping build the generator shed.

It was time to get a new generator, and to put that new generator into an outdoor shed.

 

Do you want to move the generator from the garage to a generator shed?

Read the Generator Shed article here.

The Best Two-Week Outage Generator

Firman Generator in the new shed
Firman Generator in the new shed

The best generator for a two-week outage is the Firman H08051.

This is the dual fuel Firman model with an electric start button. It does have a pull-start if the button’s battery has run out.

The generator runs on both gasoline and natural gas. The natural gas can be either propane or LPG.

With this generator, you can stock up on gas and propane for the winter. If there’s a shortage of either one, you will still be able to power your generator with the other type of fuel.

To change the fuel source, you turn the motor off, flip a switch, and turn the motor back on.

The Firman outputs an average 74 dB of noise.

This is much quieter than the generator we used for 20 years.

The generator comes with tools, wheels and oil.

Keep reading to learn how to get free shipping, free lift gate service, and a 5% rebate on the Firman H08051 Generator.

Skip the explanation and view the Firman Generator and shed pieces on Amazon now:

Firman H08051 10000/8000 Watt 120/240V 30/50A...
  • Power when you need it most. The H08051 Hybrid Dual Fuel portable generator is there to get the job done. Best used for emergency power, jobsite, farm/ranch, large RV’s and buses
  • 8 gallons 12 hours
  • Delivers true 30A & 50A power
  • Electric start
  • Dual fuel versatility
  • No hassle easy to use 5.5Ft LP (propane) hose
  • Ergonomically designed padded handle
  • Frequency (Hz): 60
  • Durable Compact Tubular Roll Cage Frame Design


Professional Grade Products 9800511 Metal...
279 Reviews
Professional Grade Products 9800511 Metal...
  • Comes with power cord
  • Painted for protection and corrosion resistance
  • 8 inches in Diameter
  • Motor located outside the air stream
  • 261 CFM fan with a low power motor
  • 60 Day Manufacturer's

Sale
soundsulate 1 lb Mass Loaded Vinyl MLV,...
79 Reviews
soundsulate 1 lb Mass Loaded Vinyl MLV,...
  • Use for soundproofing basements, conference rooms, studios, apartments, machinery, pipes and more.
  • Made with the highest quality materials for superior strength, durability and flexibility. Made in the USA.
  • STC rating 27, 1/8" thick
  • More options available at Burning River Buys
  • Heavy - weighs 1 pound per square foot or 100 pounds

Rockwool Acoustic Mineral Wool Insulation...
34 Reviews
Rockwool Acoustic Mineral Wool Insulation...
  • Mineral Wool Insulation in 8lbs per unit density.
  • Great as Acoustic insulation or as a soundproofing material
  • Cost effective and Very High NRC Rating, better than Owens Corning 703
  • Water repelling - hydrophobic- Class A fire rating
  • Rigid Boards, perfect for making acoustic panels and bass traps

Owens Corning R-19 Faced Fiberglass Roll 23'...
33 Reviews
Owens Corning R-19 Faced Fiberglass Roll 23"...
  • Individual Faced Roll - 23 Inches Wide x 39.2 Feet Long x 6.25 inches Deep
  • Idea for use in 2x6 walls, floors, crawlspaces and attics; providing Excellent thermal control & Effective acoustical control
  • With less dust than other Fiberglass products, EcoTouch PINK Fiberglass insulation has excellent stiffness and recovery characteristics
  • Compression packaging from Owens Corning speeds job site handling and installation
  • GREENGUARD GOLD Certified and validated to be Formaldehyde free

This Generator Has 8,000 Running, and 10,000 Starting Watts

This model is the most powerful dual fuel generator I could find.

It’s awesome to be able to run the well pump, dishwasher, refrigerator and microwave at the same time.

This generator runs our entire house, within reason.

“Within reason” means that we’re not turning on every single lamp, appliance, computer and television at once.

The Firman comes with a 25 ft. power cord.
The Firman generator comes with a 25 ft. power cord.

We love the extra power over our old generator. We no longer have to shut down and move power to go from powering the well pump to powering the microwave.

This Generator Runs on Propane or Gasoline, Handy if there’s a Shortage

The Firman generator runs on either gasoline and natural gas (which is propane or LPG).

Switching fuel sources is literally as easy as flipping a switch.

There’s a nifty lock designed into the switch so you don’t switch to propane while actively running on gas.

We bought the Firman H08051 generator, and we love it.
This generator accepts gasoline and natural gas as fuel. You can run one or the other at at time. If you run out of gas, you can switch to natural gas (propane or or LPG).

We chose dual fuel in case we ever needed generator power during a gasoline shortage.

The option of running on propane doubles our chances of finding fuel to run the generator.

The generator comes standard with a gas tank and a 20 or 30 lb. DOT size propane tank connection.

You can also have your gas company hook your generator to a Liquid Petroleum Gas (LPG) large tank.

This Generator Has a 12 Hour Running Time

The Firman generator runs 12 hours on 8 gallons of gasoline. That running time is calculated based on your using the generator at an average of 50% for that block of time.

I have looked high and low for how long it runs on a 20 lb. propane tank. I can’t find it. If I do, I’ll update this article.

The Firman Has an Electric Start Button

The Firman has both an electric start and a pull start.
The Firman has both an electric start and a pull start.

I’ve never gotten along with pull starts. Arthritis doesn’t make them any easier to use.

The Firman generator has an electric start button as well as a pull start.

Why both? Because you have to keep the battery powered for the electric start button to work!

Should the battery run down, you can still start the generator using the pull start.

To maintain the battery’s charge, start the generator once a month. Leave it running for 30 minutes.

This Generator is Quieter

We were used to a loud generator.

The generator controls are well-spaced and are accessible.
The controls are well-spaced and are accessible.

At 74 dB, the generator is not as quiet as a house fan, but it sends way less noise into the house than our previous generator did.

Get the Firman Dual Fuel 8,000 Watts Electric Start Button Generator Here

Firman H08051 10000/8000 Watt 120/240V 30/50A...
  • Power when you need it most. The H08051 Hybrid Dual Fuel portable generator is there to get the job done. Best used for emergency power, jobsite, farm/ranch, large RV’s and buses
  • 8 gallons 12 hours
  • Delivers true 30A & 50A power
  • Electric start
  • Dual fuel versatility
  • No hassle easy to use 5.5Ft LP (propane) hose
  • Ergonomically designed padded handle
  • Frequency (Hz): 60
  • Durable Compact Tubular Roll Cage Frame Design

Recommended  Generator Shed Supplies and Components

After we got the box on Craigslist, we modified it with an access hatch, exhaust port and insulation.

The Exhaust Port

The box that become our shed came with a louvered window like this one below.

We painted it white and called it a day.

However, we might find on using the generator that we need to exhaust the air from inside the box.

Truaire Filter Grill
Truaire Filter Grill: We box the shed frame on Craigslist. It already had a vent cover like this on the air exhaust window. The vent cover prevents rain and snow getting in while allowing air to pass.

We aready have an exhaust valve going from the generator’s output port to the outside.

But the box itself does not have any moving air.

If things get smokey in the box, we wil replace the vent cover with an exhaust fan like the one below.

Professional Grade Products 9800511 Metal...
279 Reviews
Professional Grade Products 9800511 Metal...
  • Comes with power cord
  • Painted for protection and corrosion resistance
  • 8 inches in Diameter
  • Motor located outside the air stream
  • 261 CFM fan with a low power motor
  • 60 Day Manufacturer's

Sound Insulation Materials

Sound reduction is a complicated subject. Sound waves are pesky and smart. I researched materials to soundproof the generator box. I was surprised to find so many materials that would not work.  Probably the most effective sound dampener would have been a baffle box. I was not ready to take this on.

The best material appears to be Mass Loaded Vinyl. Do not get neoprene or “sound insulation” rubber.  MLV comes in 1/2 lb., 1 lb. and 2 lb. weights. As with all sound dampening materials, the more you use, the better your results.

Rock Wool is a good alternative, and Batt Insulation comes in 3rd place.

We chose batt insulation. We cut the pieces and placed them in the shed interior. But when we put the generator in the shed, we realized that the insulation was taking up too much space. So we never installed the insulation in the shed.

Recommended Mass Loaded Vinyl

I like the “soundsulate” 1 lb. MLV.

It’s 100% virgin rubber, so there’s no off-gassing smell.

It’s made in the USA, and has 22 5-star reviews.

One reviewer used it to prevent cooking smells from coming upstairs. It also cut all the sound between floors..

Another used two layers to almost completely reduce the drum sounds from next door.

Another used it on a fence to cut noise. I was surprised that this worked, since sound will travel over obstructions.

View the Mass Loaded Vinyl on Amazon:

Sale
soundsulate 1 lb Mass Loaded Vinyl MLV,...
79 Reviews
soundsulate 1 lb Mass Loaded Vinyl MLV,...
  • Use for soundproofing basements, conference rooms, studios, apartments, machinery, pipes and more.
  • Made with the highest quality materials for superior strength, durability and flexibility. Made in the USA.
  • STC rating 27, 1/8" thick
  • More options available at Burning River Buys
  • Heavy - weighs 1 pound per square foot or 100 pounds

Reviews of this MLV are so good, I’m thinking of using this to sound proof a bedroom to give the dog a safe space when fireworks go off.

Batt Insulation

After researching the cost of mass loaded vinyl, we ended up going with an insulation sound barrier.

We got the R13 Owens Corning batt insulation to line the shed for sound reduction.

I didn’t see the R19 (below), which I would have gotten had I seen it.

When installation batt insulation in the shed, do not compress it.

The sound reduction works when there’s air between the fibers.

If you use batt, definitely get “faced” batt insulation. This puts a safe exterior on the side facing into the room.

The insuation is nasty, you don not want to get it on you.

BE CAREFUL WITH BATT INSULATION. Use gloves and glasses.

View the batt insulation on Amazon:

Owens Corning R-19 Faced Fiberglass Roll 23'...
33 Reviews
Owens Corning R-19 Faced Fiberglass Roll 23"...
  • Individual Faced Roll - 23 Inches Wide x 39.2 Feet Long x 6.25 inches Deep
  • Idea for use in 2x6 walls, floors, crawlspaces and attics; providing Excellent thermal control & Effective acoustical control
  • With less dust than other Fiberglass products, EcoTouch PINK Fiberglass insulation has excellent stiffness and recovery characteristics
  • Compression packaging from Owens Corning speeds job site handling and installation
  • GREENGUARD GOLD Certified and validated to be Formaldehyde free

Rock Wool Insulation

Rock wool insulation is effective but expensive.

We rejected it in favor of batt insulation based on price.

If I were to use rock wool, I would get thse Roxul Rock Wool insulation boards..

I love that they stand up on their own, so inserting them into the shed would be easy.

Use gloves and glasses when handing insulation.

View the Rock Wool insulation on Amazon:

Rockwool Acoustic Mineral Wool Insulation...
34 Reviews
Rockwool Acoustic Mineral Wool Insulation...
  • Mineral Wool Insulation in 8lbs per unit density.
  • Great as Acoustic insulation or as a soundproofing material
  • Cost effective and Very High NRC Rating, better than Owens Corning 703
  • Water repelling - hydrophobic- Class A fire rating
  • Rigid Boards, perfect for making acoustic panels and bass traps

How to Get Free Lift Gate Service and 5% off the Generator

The Firman generator arrived on a gigantic truck. I mean GIGANTIC.

Some companies selling generators over the internet charge you extra for “lift gate service.”

That’s the fee for getting it from the truck to your garage.

We bought our Firman generator from Amazon.

As Amazon Prime members, we got free shipping, and free lift gate service.

We also used our Amazon Prime Visa Card to buy the generator. This earned us a 5% rebate off the generator cost.

I didn't have to pay extra for "lift gate service" to get it from the truck to my front yard.
I didn’t have to pay extra for “lift gate service” to get it from the truck to my front yard.
  1. Free shipping and lift gate service. If you have an Amazon Prime membership, the generator shipping will be free, including the lift gate service. Get an Amazon Prime Membership here.
  2.  0% financing and a 5% rebate. If you use the Amazon Prime Visa card to pay for the generator, you will get a 5% rebate on the generator. Get an Amazon Prime Rewards Visa here. Amazon is offering 18 month financing at 0% (available at the time of publication, hurry, I don’t know how long the offer will last).
  3. Run on gasoline, propane, or with LPG from your gas company.
  4. It’s way quieter than older model generators.
  5. Runs for 12 hours per tank.
  6. Easy electric start button.
  7. 8,000 running watts, enough to run my 2 story house.

Firman H08051 10000/8000 Watt 120/240V 30/50A...
  • Power when you need it most. The H08051 Hybrid Dual Fuel portable generator is there to get the job done. Best used for emergency power, jobsite, farm/ranch, large RV’s and buses
  • 8 gallons 12 hours
  • Delivers true 30A & 50A power
  • Electric start
  • Dual fuel versatility
  • No hassle easy to use 5.5Ft LP (propane) hose
  • Ergonomically designed padded handle
  • Frequency (Hz): 60
  • Durable Compact Tubular Roll Cage Frame Design


Professional Grade Products 9800511 Metal...
279 Reviews
Professional Grade Products 9800511 Metal...
  • Comes with power cord
  • Painted for protection and corrosion resistance
  • 8 inches in Diameter
  • Motor located outside the air stream
  • 261 CFM fan with a low power motor
  • 60 Day Manufacturer's

Sale
soundsulate 1 lb Mass Loaded Vinyl MLV,...
79 Reviews
soundsulate 1 lb Mass Loaded Vinyl MLV,...
  • Use for soundproofing basements, conference rooms, studios, apartments, machinery, pipes and more.
  • Made with the highest quality materials for superior strength, durability and flexibility. Made in the USA.
  • STC rating 27, 1/8" thick
  • More options available at Burning River Buys
  • Heavy - weighs 1 pound per square foot or 100 pounds

Rockwool Acoustic Mineral Wool Insulation...
34 Reviews
Rockwool Acoustic Mineral Wool Insulation...
  • Mineral Wool Insulation in 8lbs per unit density.
  • Great as Acoustic insulation or as a soundproofing material
  • Cost effective and Very High NRC Rating, better than Owens Corning 703
  • Water repelling - hydrophobic- Class A fire rating
  • Rigid Boards, perfect for making acoustic panels and bass traps

Owens Corning R-19 Faced Fiberglass Roll 23'...
33 Reviews
Owens Corning R-19 Faced Fiberglass Roll 23"...
  • Individual Faced Roll - 23 Inches Wide x 39.2 Feet Long x 6.25 inches Deep
  • Idea for use in 2x6 walls, floors, crawlspaces and attics; providing Excellent thermal control & Effective acoustical control
  • With less dust than other Fiberglass products, EcoTouch PINK Fiberglass insulation has excellent stiffness and recovery characteristics
  • Compression packaging from Owens Corning speeds job site handling and installation
  • GREENGUARD GOLD Certified and validated to be Formaldehyde free

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